| intolerant | intolerant |
| Intoleranz | intolerance |
| tolerant | tolerant |
| Toleranz | tolerance |
| indolent | indolent |
| insolent | ill-mannered impertinent insolent |
| Intonierung | intonation |
| intrigant | conniving |
| Intrigant | intriguer |
| Integrand | integrand |
| Intendant | artistic director theatre manager |
| Internat | boarding school |
| Internet | Internet Net |
| Intranet | intranet |
| interessant | interesting |
| intern | internal |
| Indolenz | idleness |
| Insolenz | boldness |
| Inserat | advertisement |
| Unterart | subspecies |